Migrate components including ApiLink for the Documentation content

[haneepark]

Motivation:

• Background: Initialize a Docusaurus project for the new Armeria site #6098
• I am starting the migration with the Documentation menu, as its content is the least dynamic.

Modifications:

• Implement remark plugin for api link.
• Implement AspectRatio, ApiLink components.
• Use the built-in CodeBlock component and add language support.
• Register components to global scope to use them in every MDX file without importing.
• Add a CLI option for not opening the browser on start.
• Remove auto generated initial docs.

Result:

• Api link syntax in MDX has changed from <type://RequestContext> to [RequestContext](type). See site-new/docs/api-link-test.mdx for usages. I made this change because the old syntax is no longer allowed in MDX v3. (See MDX docs)

[haneepark]

The files under /gen-src-temp are to be removed after migrating build.gradle.

[github-actions]

🔍 Build Scan® (commit: bbaaaf9)

Job name	Status	Build Scan®
build-ubicloud-standard-16-jdk-8	✅	https://ge.armeria.dev/s/ym25i3tgxam6q
build-ubicloud-standard-16-jdk-21-snapshot-blockhound	✅	https://ge.armeria.dev/s/sthxxxlss2q6u
build-ubicloud-standard-16-jdk-17-min-java-17-coverage	✅	https://ge.armeria.dev/s/mxodxve2oq77w
build-ubicloud-standard-16-jdk-17-min-java-11	✅	https://ge.armeria.dev/s/dwcpsjfqoa2su
build-ubicloud-standard-16-jdk-17-leak	✅	https://ge.armeria.dev/s/k6lgcnf6zkfti
build-ubicloud-standard-16-jdk-11	✅	https://ge.armeria.dev/s/rblkonyqiymkg
build-macos-latest-jdk-21	✅	https://ge.armeria.dev/s/weaabufiy77wu

[ikhoon]

Locally tested and it worked successfully.

[minwoox]

Thanks, @haneepark!